Mask frame



FIG. 1 is a front perspective view of a mask frame according to a first embodiment of our design;

FIG. 2 is a rear perspective of the mask frame shown in FIG. 1;

FIG. 3 is a front view of the mask frame shown in FIG. 1;

FIG. 4 is a rear view of the mask frame shown in FIG. 1;

FIG. 5 is a right side view of the mask frame shown in FIG. 1, with the left side view being a mirror image thereof;

FIG. 6 is a top view of the mask frame shown in FIG. 1;

FIG. 7 is a bottom view of the mask frame shown in FIG. 1;

FIG. 8 is a front perspective view of a mask frame according to a second embodiment of our design;

FIG. 9 is a rear perspective of the mask frame shown in FIG. 8;

FIG. 10 is a front view of the mask frame shown in FIG. 8;

FIG. 11 is a rear view of the mask frame shown in FIG. 8;

FIG. 12 is a right side view of the mask frame shown in FIG. 8, with the left side view being a mirror image thereof;

FIG. 13 is a top view of the mask frame shown in FIG. 8;

FIG. 14 is a bottom view of the mask frame shown in FIG. 8;

FIG. 15 is a front perspective view of a mask frame according to a third embodiment of our design;

FIG. 16 is a rear perspective of the mask frame shown in FIG. 15;

FIG. 17 is a front view of the mask frame shown in FIG. 15;

FIG. 18 is a rear view of the mask frame shown in FIG. 15;

FIG. 19 is a right side view of the mask frame shown in FIG. 15, with the left side view being a mirror image thereof;

FIG. 20 is a top view of the mask frame shown in FIG. 15;

FIG. 21 is a bottom view of the mask frame shown in FIG. 15;

FIG. 22 is a front perspective view of a mask frame according to a fourth embodiment of our design;

FIG. 23 is a rear perspective of the mask frame shown in FIG. 22;

FIG. 24 is a front view of the mask frame shown in FIG. 22;

FIG. 25 is a rear view of the mask frame shown in FIG. 22;

FIG. 26 is a right side view of the mask frame shown in FIG. 22, with the left side view being a mirror image thereof;

FIG. 27 is a top view of the mask frame shown in FIG. 22; and,

FIG. 28 is a bottom view of the mask frame shown in FIG. 22. 

The ornamental design for a mask frame, as shown and described. 